When, during a video call on a program such as Skype, both parties fall asleep while not exiting the call.
Person 1: Hey, I heard your friend from out of town spent the night!
Person 2: No, we just fell asleep together over Skype.
Person 1: Ah, so you had a long-distance sleepover.
Person 2: Guess so.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.